Particle size distribution and structural changes in limestone ground in planetary ball mill

2014 ◽  
Vol 126 ◽  
pp. 41-48 ◽  
Author(s):  
Pedro L. Guzzo ◽  
Juliano B. Santos ◽  
Renato C. David
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Ball Mill ◽  
Structural Changes ◽  
Planetary Ball Mill

Combustion Synthesis of β-SiAlON Using 3D Ball Milling

2017 ◽  
Vol 898 ◽  
pp. 1717-1723 ◽  
Author(s):  
Xue Mei Yi ◽  
Shota Suzuki ◽  
Xiong Zhang Liu ◽  
Ran Guo ◽  
Tomohiro Akiyama
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Combustion Synthesis ◽  
Ball Mill ◽  
Raw Materials ◽  
Raw Material ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Material Particle

Combustion synthesis (CS) of β-SiAlON was conducted using a 3D ball mill, with a focus on the effect of the 2D/3D ball mill premixing conditions on the CS raw material particle size as well as on the yield and grain shape of the final products. The results showed that the particle size distribution of the raw materials was significantly affected by the premixing conditions. Various particle sizes and particle size distributions could easily be obtained by using a 3D mill instead of a 2D mill due to the complex biaxial rotation movement of 3D milling. The particle size was more sensitive to the rotation ratio (vertical spin/horizontal spin, Vv/Vh) than the rotation rate when using 3D milling. Finally, β-SiAlON with less than 5 mass% unreacted Si was obtained using premix milling conditions of 135×200 [vertical spin (rpm) × horizontal spin (rpm)]. The grain shapes of the final products were clearly influenced by the particle size distribution of the raw mixtures.

Investigation on Crushing Kinetic Equation of Ball Milling of Quartz Powder

2010 ◽  
Vol 156-157 ◽  
pp. 812-816 ◽  
Author(s):  
Shu Xian Liu ◽  
Li Li Shen ◽  
Qian Ping Wang ◽  
Fu Sheng Niu
Keyword(s):  
Particle Size ◽  
Kinetic Equation ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Ball Milling ◽  
Ball Mill ◽  
Order Kinetic ◽  
Quartz Powder ◽  
Grinding Speed ◽  
Equation Of Time

The kinetic equation of ball milling of quartz powder was deducted. by grinding quartz experiments in a intermittent ball mill. The results showed that: (1) Conventional first-order kinetic equation which describe the velocity of quartz grinding is not concordant with theory. Dynamics parameters are not constant, but time-related. (2) The kinetic equation of time correction can more clearly express their grinding speed. Fitted regression equation has a more accuracy prediction for the instantaneous concentration of particle size, and obtain the dynamics constants. (3) The grinding speed has a maximum value over time because of the particle size distribution and grading comminution. (4).The time index is not only related with the material nature and conditions of the grinding, but also with the particle size distribution. To predict accurately, the grade range should be narrow. (5). Different grinding time distribution of particles in the ball mill should be measured in the continuous grinding process. The comminution results can be predicted by the kinetic equation mentioned above.

scholarly journals Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 283
Author(s):  
Juntao Ma ◽  
Daguang Wang ◽  
Shunbo Zhao ◽  
Ping Duan ◽  
Shangtong Yang
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Cement Paste ◽  
Ball Mill ◽  
Particle Morphology ◽  
Spherical Particles ◽  
Grinding Process ◽  
And Performance

The grinding process has become widely used to improve the fineness and performance of fly ash. However, most studies focus on the particle size distribution of ground fly ash, while the particle morphology is also an important factor to affect the performance of cement paste. This article aims at three different kinds of ground fly ash from the ball mill and vertical mill, and the particle morphology is observed by scanning electron microscopy (SEM) to calculate the spherical destruction (the ratio of spherical particles broken into irregular particles in the grinding process of fly ash), which provides a quantification of the morphology change in the grinding process. The fluidity of cement paste and the strength of cement mortar are tested to study the relation of spherical destruction and fluidity and strength. The results show that the spherical destruction of ground fly ash in a ball mill is more than 80% and that in a vertical mill with a separation system is only 11.9%. Spherical destruction shows a significant relation with the fluidity. To different addition of ground fly ash, the fluidity of cement paste decreases with the increase of spherical destruction. To the strength of cement paste, particle size distribution and spherical destruction are both the key factors. Therefore, spherical destruction is an important measurement index to evaluate the grinding effect of the fly ash mill.

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